In Riders of Icarus, as the Open Beta starts the max level and the attainable will be level to 25, and in July the level cap will reach to 35 after several updates. With nothing glamorous, in the first closed beta the level cap was lvl 20, it was only used for testing out the overall thoughts there and what the reaction of players.
In the second one adding with a new regain, it is expanded the level cap to
level 25, and people could tame the awesome beasts, and it is a challenge for players
that a new 10 men raid the boss with enough difficulty and keep them interested
in it, however Nexon didn't expand the level cap in the third closed beta,
instead a new combat mode is added and called action combat, the ability to
"sprint" while on ground mounts.
In the third depending on the fact closed beta they didn't raise
the level cap, in the open beta they might not change the level cap, and it
would be a grave business decision, and could hurt the game in the long run, so
Nexon will have to pick a level cap with enough content duo to that, and not
too high to skip allot of content, while holding players till they can deliver
the next wave of dungeons and zone(s), and world bosses, familiars etc. .
More details you can check:https://www.mmogah.com/news/title/analysis-of-max-level-in-riders-of-icarus